Pencil



July 3l, 1928.

J. SWANBERG PENCIL vFiled May 23, 1921 Mms 510417 er Afm Patented July 3l, 1923.

iiNirso STATES? PATENT c, OFFICE.

JULIUSSWANBERG, or CHICAGO, ILLINOIS, AssIG'NOR rro SwANBER-G MANUFACTUR- ING COMPANY, OF CHICAGO, ILLINOIS, A conrORA'r-ION OF ILLINOIS.

PENCIL.

Application sied May as,

This invention relates to a pencil and particularly to a metallic pencil comprising a small number of inexpensive, easily assembled parts. rl'he depletion of the supply of suitable wood for pencils and the trouble occasioned by sharpening the same has ne-v f may be conveniently and quickly inserted for use in the pencillt is an object of the present invention to provide la pencil wherein a lead guiding tube is rotatably mounted in the pencil casing.

lt is a further object of this invention to provide a pencil having a relatively rotatable lead guiding tube extending axially of the pencil casing and having a chamber for l extra leads formed between the tube and the casing.

lt is a further object of this invention to provide a pencil wherein lead guiding means vextend axially through the pencil casing and protrude from the lower end thereof.

lt is an important object of this invention to provide ay pencil which maybe conveniently assembled and which consists entirely of parts which may be economically manufactured.

@ther and further important objects of this invention will be apparent from Y the disclosures in the specication and the accompanying drawings.'

The invention (in a .preferred form) is illustrated in the drawings and hereinafter more :fully described.

Gn the drawings:

Figure 1 is a side elevation ola pencil embodying the principles of this invention.

Figure 2 is an enlarged section on the line 2-2 of Figure 1.

Figure 3 is a slightlyenlarged Iragmentary elevation oli a part of the lead feeding mechanism.

Figure i is a detail plan view of the connecting means on the lead feeding plunger.

Figure 5 is a fragmentary side elevation 'tion showing 1921. Serial No. 471,537.

of the connecting means-On the lead feeding plunger. l

Figure 6 is an enlarged fragmentary secthe method of securing the lead guiding tube in the pencil casing.

Figure 7 is a slightly enlarged Section on the line 7 7A of Figure 2, and

Figure S'isa sli htly enlarged section on the liner 8-.8 of Figure 2. f f

As shown on the drawings: i

ine outside of the pencil of this invention preferably comprises a tubular casing 1,`

which is reduced at one end to form a con.- ical point 2 and the other end .of which'is formed inwardly to afford an internal bead 3 which isV adapted to springingly engage ln a peripheral groove in a cap l, this s )ringing engagement A`being allowed'by slots 5 'in the casing 1 extending downwardly for short distance froinsaid bead 3. The outer end of the cap 4- is; recessed to receive a suitable eraser 7 which is frictionally Se,- cured therein and theinner end of said cap is recessed and has frictionally Secured therein the end of a lead guiding tube 8- `which extends axially of the casing and protrudes from the conical point 2 thereof. The lower end of said lead guiding tube 8 is rotatably secured in said conical point 2 `by the engagement of the annular lla-nge 9 on the inside of the casing near the lower end of said point with an annular recess in the tube; The ange 9 and the recess in the tube 8 are so proportioned that the portion of said tube which protrudes from the point'is flush with the outer walls 'of the pencil casing, and said protruding'portion is slotted at 10 and bent slightly inwardly to frictionally engage a lead 11 which protrudes therefrom and which extends upwardly into the tube 8. Mounted inside the tube 8 and abutting the inner end of the lead 11 is a wire plunger 12 which is provided with a curved transverse projection 13 which extends outwardly through a longitudinal slot 14 in said tube and which is engaged between the coils of a helical Spring` 15 inounted'in the casing 1 above the conical point 2 and held by its own frictional engagement with the inside of said casing from movement relative thereto. The spring 15 in effect provides a feeding screw ywhich is engaged bythe projection 13 on the wire plunger 12, and since said spring is frictionally held from movement relative lll) z it may rection of rotation of the cap and the tube.V

A chamber for extra leads is afforded inside the upper end of the casing l by securing a disk or washer 16 to the tube 8 above the upper end out the spring 15. Y

The operation of the pencil of this invention is very simple 'for when the protruding point of the lead l1 becomes worn it is only necessary to rotate the cap 4 to cause the plunger 12 to `torce the lead outwardly from the tube 8 which also rotates with said cap. New leadsmay be inserted in the pencil by rotating the cap 4 in the opposite direction until the plunger 12 is in the extreme inward position and subsequently forcing the lead into the tube 8 through the slotted protruding point thereof. Since the cap 4 is only rictionally held in contact with the casing be easily removed to aiord access to the extra lead compartment above the disk It will be noted romthe oreging specification that the pencil of this invention is composed of parts which may be economically manufactured and conveniently assembled. The provision of the rotatable lead guiding tube 8 affords a single connection between the lead feeding mechanism and the rotatable cap, and by extending said tube through the conical point of the pencilthe necessity of a special lead-engaging point for the pencil is obviated. Said tube 8 is extended through the conical point 2, the opening through which is originally ot greater diameter than casing is subsequently swaged or spun inwardly to reduce this ydiameter so that the iiange or inward projection 9 thereon is engaged in the recess in the tube 8. v

l am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting` the patent granted otherwise than necessitated by the prior art.

I claim as my invention; t

A pencil, comprising an outer casing hav'- inga conical tip and a slotted internally beaded top, a lead guiding tube extending the length of said casing and swivelly held against relative axial movement in thel conical tip thereo'l:l and a closure `member resiliently held for relative rotation by said internally beaded topi and in friction'al ,non-

rotative engagement with the end of said lead guiding tube. i

ln testimony whereof I have hereunto subscribed iny name.

JULIUS SWANBERG.

the tube 8, vand the 

